Table 2

Predicted Rates of CHD Death or Nonfatal MI Within 5 Years and Corresponding NNTlegend

Risk LevelRange5-Year Risk
PravastatinNo PravastatinNNT
Prognostic index:
 Low≤1.85.0%6.4%71
 Medium1.8–2.67.8%9.9%48
 High2.6–3.710.7%13.5%36
 Very high>3.719.0%23.6%22
Risk score:
 Low≤44.6%5.8%83
 Medium5–68.1%10.3%45
 High7–910.7%13.5%36
 Very high≥1016.1%20.2%24
  • Range of the prognostic index or risk score that defines the corresponding risk level. Event rates are broken down by risk level using both the detailed (prognostic index) and simplified (risk score) methods and are based on the multivariate model with common relative risk reduction for all risk levels.

  • legend CHD = coronary heart disease; MI = myocardial infarction; NNT = number needed to treat.